I2C or not I2C
I want to give it a try and make an ESP8266 custom project, but without a module. I will use ESP8266EX, so along the way, there may be some questions, where I haven't find an answer to on the internet.
So the first problem I run into is pin mapping.
I usually use ESP12F where I2C pins are on GPIO4 and 5. But according to a datasheet on ESP8266EX, I2C is on GPIO2 and 14. Is that mean the mapping on ESP12F is not as on ESP8266 barebone? If I2C is on GPIO2 and 14, then, what about the pullup resistor on GPIO2 I usually use when designing something with ESP12F? Or, GPIO2 on ESP12F is not the same as the one on ESP8266EX.
This is pretty much confusing.